Shadow DOM Debugger is a free Chrome extension designed to facilitate the inspection and debugging of Shadow DOM elements on any webpage. It allows users to find, highlight, and analyze hidden components that are typically obscured from the standard DevTools view. The tool features an intuitive interface where users can click the extension icon to scan the page for shadow roots, which are then marked with distinctive purple dashed outlines to enhance visibility. Users can inspect these elements using a sidebar that reveals their internal tree structure, making it easier to understand complex web components.

Among its notable features, Shadow DOM Debugger offers dynamic detection of shadow roots through MutationObserver, allowing it to identify new elements added after the initial page load. Users can switch between list and tree views, copy the innerHTML of shadow roots to the clipboard, and toggle the visibility of shadow hosts to visualize the page without them. With a strong emphasis on privacy, the extension ensures that no data is transmitted or shared, making it a reliable tool for web component developers, frontend engineers, and anyone interested in the workings of Shadow DOM.